I've been battling hi alkalinity for the past week or so and let it naturally decrease from 16 to about 11. I kept my calcium reactor off during that period of time and had turned it back on last week. Yesterday I test my alkalinity and calcium and they were both hi, 16 and 558. So off went the reactor. When calcium is hi alkalinity usually drops but I can't seem to get it balanced. Any and all help would be appreciated. Amazingly enough I'm only have problems with a couple of sps while most are doing ok but not great. LPS are a problem though, lost a couple of wellsophyllia and a good part of a beautiful Duncan